The Crowded Cosmos: Effects of Blended Galaxies on Cosmic Shear
In today’s paper, we learn how overlapping galaxies affect weak lensing measurements that the LSST will make.
Through the Lens: Milky Matter Magnifies Magellanic Motion
How does one go about detecting dark matter-only structures in the Milky Way? Look at velocity corrections of stars far beyond our galaxy, in the Magellanic clouds!
How to Read (LSS)Tea Leaves to Better Understand Dark Energy
How would the LSST have to survey the sky in order to study dark energy?
Where is that galaxy pointing?
Gravitational lensing is the deflection of the trajectory of a photon by gravity, and it is a natural consequence of the theory of General Relativity. Lensing distorts the shapes and orientations of galaxies and in today’s post, we discuss a new method to reconstruct dark matter maps of our Universe using the position angles of galaxies.
Citizen science: Observing dark worlds
Observing dark worlds is a public competition for improving algorithms to find dark matter halos in weak gravitational lensing maps. Today, we discuss citizen science projects and describe the results of the challenge.